Major auto racing events are often named Grands Prix (plural form of Grand Prix), a tradition dating back to the first decade of the 20th Century and the Grand Prix motor racing of the 1920s and 1930s. Formally, for a race to be called a Grand Prix, it should have a race distance of at least 300 km (190 mi).[1] This rule held for every Grand Prix which was ever on the Formula 1 calendar with the exception of the Monaco Grand Prix – which has had a race distance of less than 300 km since 1968.

^Manishin, Glenn B. "The Early Years". Retrieved 24 October 2011. The minimum race distance was reduced from 500 km (311 miles) to 300 km (186 miles), allowing the Monaco Grand Prix to be re-introduced after a two-year interval in 1950

^The European Grand Prix has been held in Germany (12 times), Spain (7 times), the United Kingdom (3 times), and Azerbaijan (1 time).

^Strictly speaking, the Indianapolis 500 is not a "Grand Prix", but it was included as a round of the World Championship in 1950–1960.